Carlos Trallero-Herrero et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 074014 doi:10.1088/0953-4075/41/7/074014
Carlos Trallero-Herrero1,2, Stephen D Clow1, Thomas Bergeman1 and Thomas Weinacht1
Show affiliationsWe demonstrate a population inversion in a three-level system via three-photon absorption from a single shaped ultrafast laser pulse. The optimal pulse shape for the inversion is discovered using closed-loop learning control and interpreted via pulse shape parameter scans and numerical integration of the Schrödinger equation. The population inversion is measured using a combination of spontaneous and stimulated emissions. Our results illustrate the importance of dynamic Stark shifts in coherent multi-photon excitation.
32.80.Xx Level crossing and optical pumping
32.80.Rm Multiphoton ionization and excitation to highly excited states
32.50.+d Fluorescence, phosphorescence (including quenching)
Issue 7 (14 April 2008)
Received 25 October 2007, in final form 16 December 2007
Published 25 March 2008
Carlos Trallero-Herrero et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 074014
C Aupetit et al 2004 Metrologia 41 07002
Christian G Böhmer et al 2008 Class. Quantum Grav. 25 045015
J Taruna et al 2008 J. Phys. A: Math. Theor. 41 035308
Tom Nelson et al 2008 Metrologia 45 01009
Jacek Pawełczyk and Rafał R. Suszek JHEP04(2006)009
H C McEvoy 2008 Metrologia 45 03002
A I Pokhodun and A G Ivanova 2008 Metrologia 45 03005
Adriano Cavalcanti et al 2008 Nanotechnology 19 015103
Athanasios Dedes et al JHEP11(2007)059